【摘要】 本文采用硫氰酸钾络合比色法，探讨了几种表面活性剂对Fe3+测定的作用。结果表明，非离子型表面活性剂曲拉通X－100，吐温-20均有极大的增效作用，而几种阴离子型表面活性剂则产生“褪色”效果。加入适量的曲拉通X－100时，测定的灵敏度及稳定性均较佳，其摩耳吸光系数高达6．02×105，较对照提高79．2％。在该条件下，测定的检出限为2．5μg，相关系数r=0．9992，相对标准偏差为3．4％，添加标准铁4．0～15．0μg，回收率为96．3％～105.9％，完全达到检测的要求。更多还原

【Abstract】 It was carried out that several surface active agents affected on determination of iron(Fe3+ )by spectrophotometeric method added potassium sulfocyanate. The sensitivity of detection increased significantlyfortifized with the non - ionic surface active agents such as triton X-100 and tween-20, while decreasedadded the anionic ones. The sensitivity and stability were relatively appropriate for detection whileadded triton X-100. And molar absorption coeffcient was 6. 02 X 105L/mol. cm,increasing 79. 2 % comparedwith the control. This method was developed with correlation index of 0.9992 for calibration curve,detectionlimit of 2. 5pg,relative standard deviatlon of 3. 4 % and recovery of 96. 3 % ~ 105. 8 % with the additionof 4. 0~ 15. 0μg iron(Fe3+ ).更多还原